Sur d’autres sites (12883)

• ffmpeg udp live stream publish to rtmp

  2 juin 2016, par Pilskalns

  I need to make this chain :
  JVC HM650—UDP—>localhost—>ffmpeg(copy stream)—>nginx-rtmp

  On input I have UDP stream from camera (udp ://@:35501) and I need it to publish to rtmp server (nginx with rtmp module). Apart everything works - I can play input on VLC, I can stream from FMLE to nginx etc. Except, this is my first time with ffmpeg and I can’t get it work. So :

  This is best i have got :

  C:\ffmpeg\bin>ffmpeg -re -i udp://@:35501 -f flv "rtmp://192.168.1.17/live/live" -loglevel debug
  
  ffmpeg version N-69972-g6c91afe Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu
  
  tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-
  
  libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-l
  
  ibrtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --
  
  enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --ena
  
  ble-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 19.100 / 54. 19.100
  
    libavcodec     56. 25.100 / 56. 25.100
  
    libavformat    56. 23.100 / 56. 23.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.100 /  5. 11.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Splitting the commandline.
  
  Reading option '-re' ... matched as option 're' (read input at native frame rate) with argument '1'.
  
  Reading option '-i' ... matched as input file with argument 'udp://@:35501'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'flv'.
  
  Reading option 'rtmp://192.168.1.17/live/live' ... matched as output file.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option loglevel (set logging level) with argument debug.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file udp://@:35501.
  
  Applying option re (read input at native frame rate) with argument 1.
  
  Successfully parsed a group of options.
  
  Opening an input file: udp://@:35501.
  
  [udp @ 0000000002c30760] end receive buffer size reported is 65536
  
  [AVIOContext @ 0000000002c513c0] Statistics: 0 bytes read, 0 seeks
  
  udp://@:35501: Immediate exit requested
  
  Received signal 2: terminating.
  
  
  
  C:\ffmpeg\bin>

  What is wrong with ffmpeg configuration ?

  SOLUTION :

  The ffmpeg was listening on wrong version of UDP protocol :

  Even IPv6 is disabled on network cards, internally in system, using @ allowed ffmpeg listen at UDPv6.

  By using 127.0.0.1 tells ffmpeg to use clean UDP.

  Thanks, @thomas to make me think differently !

• Ffmpeg Command to capture video from Decklink 4k Extreme in Ubuntu Linux

  24 septembre 2016, par George.Ef

  I am trying to capture a video using ffmpeg, from the HDMI input port of the Blackmagic DeckLink 4K Extreme capture card in Ubuntu Linux.

  As per the ffmpeg Documentation I have tried the following :

  ffmpeg -f decklink -video_input 'hdmi' -i 'DeckLink 4K Extreme (1)@14' -acodec copy -vcodec copy ~/testCapture/card1_f14_hdmi.avi

  but no matter what I do I always get this picture as a video
  

  My ffmpeg version is :

  ffmpeg version git-2016-08-15-4899953 Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
  configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static 
  
  --extra-cflags=-I/root/ffmpeg_build/include 
  
  --extra-ldflags=-L/root/ffmpeg_build/lib 
  
  --bindir=/root/bin --enable-gpl --enable-libass --enable-libfdk-aac 
  
  --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora 
  
  --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 
  
  --enable-decklink 
  
  --extra-cflags=-I/root/decklinkSDK/Blackmagic_DeckLink_SDK/Linux/include
  
  --extra-ldflags=-L/root/decklinkSDK/Blackmagic_DeckLink_SDK/Linux/include
  
  --enable-nonfree
  
  libavutil      55. 28.100 / 55. 28.100
  
  libavcodec     57. 51.102 / 57. 51.102
  
  libavformat    57. 46.101 / 57. 46.101
  
  libavdevice    57.  0.102 / 57.  0.102
  
  libavfilter     6. 51.100 /  6. 51.100
  
  libswscale      4.  1.100 /  4.  1.100
  
  libswresample   2.  1.100 /  2.  1.100
  
  libpostproc    54.  0.100 / 54.  0.100

  I have two of these cards as per the following :

  ffmpeg -f decklink -list_devices 1 -i dummy
  
  .....
  
  [decklink @ 0x2e9e440] Blackmagic DeckLink devices:
  
  [decklink @ 0x2e9e440]    'DeckLink 4K Extreme (1)'
  
  [decklink @ 0x2e9e440]    'DeckLink 4K Extreme (2)'

  I am able to get a list of the supported formats with the following :

  ffmpeg -f decklink -list_formats 1 -i 'DeckLink 4K Extreme (1)'
  
  ...
  
  [decklink @ 0x36e2440] Supported formats for 'DeckLink 4K Extreme (1)':
  
  [decklink @ 0x36e2440]    1   720x486 at 30000/1001 fps (interlaced, lower field first)
  
  [decklink @ 0x36e2440]    2   720x576 at 25000/1000 fps (interlaced, upper field first)
  
  [decklink @ 0x36e2440]    3   1920x1080 at 24000/1001 fps
  
  [decklink @ 0x36e2440]    4   1920x1080 at 24000/1000 fps
  
  [decklink @ 0x36e2440]    5   1920x1080 at 25000/1000 fps
  
  [decklink @ 0x36e2440]    6   1920x1080 at 30000/1001 fps
  
  [decklink @ 0x36e2440]    7   1920x1080 at 30000/1000 fps
  
  [decklink @ 0x36e2440]    8   1920x1080 at 25000/1000 fps (interlaced, upper field first)
  
  [decklink @ 0x36e2440]    9   1920x1080 at 30000/1001 fps (interlaced, upper field first)
  
  [decklink @ 0x36e2440]    10  1920x1080 at 30000/1000 fps (interlaced, upper field first)
  
  [decklink @ 0x36e2440]    11  1920x1080 at 50000/1000 fps
  
  [decklink @ 0x36e2440]    12  1920x1080 at 60000/1001 fps
  
  [decklink @ 0x36e2440]    13  1920x1080 at 60000/1000 fps
  
  [decklink @ 0x36e2440]    14  1280x720 at 50000/1000 fps
  
  [decklink @ 0x36e2440]    15  1280x720 at 60000/1001 fps
  
  [decklink @ 0x36e2440]    16  1280x720 at 60000/1000 fps
  
  ...
  
  DeckLink 4K Extreme (1): Immediate exit requested

  What should I use with ffmpeg in order to capture an HD video with sound from the HDMI port ?

• FFMPEG hevc_nvenc "No NVENC capable devices found" with NVidia GTX950M

  5 juillet 2018, par NaturalBornCamper

  I get the error "No NVENC capable devices found" when trying a simple encoding like this, even skipping audio to make sure it’s not an audio problem :

  ffmpeg.exe -i input.mp4 -c:v hevc_nvenc -an out.mp4

  I also tried with more details, like setting the pixel format, the preset, the rate-control, the format.

  On the documentation page there :
  https://trac.ffmpeg.org/wiki/HWAccelIntro
  it says that if we get this error we should check for the pixel format. The video has yuv420p here and even specifying the format results in the same error.

  i also checked the NVidia supported cards and it says GeForce, but no details about the models :
  https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Encoder

  I tried h264_nvenc and it works perfectly however, the problem is only with hevc_nvenc
  Has anyone encountered this problem ?

  Complete console output :

  [h264 @ 0000000002534560] Reinit context to 1280x544, pix_fmt: yuv420p
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isom
  
      creation_time   : 2014-05-23T13:04:15.000000Z
  
    Duration: 01:54:03.95, start: 0.000000, bitrate: 3193 kb/s
  
      Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x544 [SAR 1:1 DAR 40:17], 2750 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-05-23T11:25:27.000000Z
  
      Stream #0:1(spa): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 439 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-05-23T12:56:43.000000Z
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_nvenc))
  
  Press [q] to stop, [?] for help
  
  [h264 @ 000000000260ea40] Reinit context to 1280x544, pix_fmt: yuv420p
  
  [graph 0 input from stream 0:0 @ 0000000003857ec0] w:1280 h:544 pixfmt:yuv420p tb:1/24000 fr:24000/1001 sar:1/1 sws_param:flags=2
  
  [hevc_nvenc @ 00000000038574e0] Loaded Nvenc version 8.0
  
  [hevc_nvenc @ 00000000038574e0] Nvenc initialized successfully
  
  [hevc_nvenc @ 00000000038574e0] 1 CUDA capable devices found
  
  [hevc_nvenc @ 00000000038574e0] [ GPU #0 - < GeForce GTX 950M > has Compute SM 5.0 ]
  
  [hevc_nvenc @ 00000000038574e0] Codec not supported
  
  [hevc_nvenc @ 00000000038574e0] No NVENC capable devices found
  
  [hevc_nvenc @ 00000000038574e0] Nvenc unloaded
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  Conversion failed!